1/2	C	Baking soda
1/2	C	Cornstarch
		Fragance oil of desired scent or combination of compatible scents (usually about 40 drops) - optional

In essence, you want equal parts of baking soda and cornstarch, along with about 20 drops scent for each 1 1/2 cups of the baking soda/cornstarch mixture if you want the powder to be scented. The above quantities are provided only as a starting point.

Procedure:

Combine baking soda and cornstarch.
Mix together until thoroughly blended.
If desired, add fragance oil by the drop and stir until thoroughly blended.
Let dry before packaging.